{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:U3X23CONANM2VOW22TFFCETEC4","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"e1679af45f6018162999bcb2af7ce192a86bd8b5ca5d1c900f6a848cd3056651","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-04-01T09:01:01Z","title_canon_sha256":"043ec39e16ca42253713d9ec91890e34b34ab095b656c9e813205081fc8ffa43"},"schema_version":"1.0","source":{"id":"0904.0101","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0904.0101","created_at":"2026-05-18T02:14:08Z"},{"alias_kind":"arxiv_version","alias_value":"0904.0101v2","created_at":"2026-05-18T02:14:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0904.0101","created_at":"2026-05-18T02:14:08Z"},{"alias_kind":"pith_short_12","alias_value":"U3X23CONANM2","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"U3X23CONANM2VOW2","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"U3X23CON","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:b91da2c41f510d8393491108cfd62e7f6d5e8d04ace20c3359a8b9e0518bd9a5","target":"graph","created_at":"2026-05-18T02:14:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We characterize the physical properties of T Chamaeleontis, a transitional T Tauri star showing UX Ori-type variability, and of its associated disc, and probe possible effects of disc clearing processes. Different spectral diagnostics are examined, based on a rich collection of optical high- and low-resolution spectra. We determine radial and projected rotational velocities, and measure equivalent widths of the Li I (6708 A) line and of the most prominent emission lines (e.g. Ha, Hb and [OI] 6300A); we analyse shape changes of photospheric lines via bisector-method, while variability in Ha and","authors_text":"D. Gandolfi, E. Covino, E. Schisano, E.W. Guenther, J.M. Alcala', M. Esposito","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-04-01T09:01:01Z","title":"Variability of the transitional T Tauri star T Chamaeleontis"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0904.0101","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:9fefa26ab7da07062e3a8897f6e64929bc3a4d17b10b8ec35253e6afff532a05","target":"record","created_at":"2026-05-18T02:14:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"e1679af45f6018162999bcb2af7ce192a86bd8b5ca5d1c900f6a848cd3056651","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-04-01T09:01:01Z","title_canon_sha256":"043ec39e16ca42253713d9ec91890e34b34ab095b656c9e813205081fc8ffa43"},"schema_version":"1.0","source":{"id":"0904.0101","kind":"arxiv","version":2}},"canonical_sha256":"a6efad89cd0359aabadad4ca511264170bc0144244a2a6bcc923b58793a53399","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a6efad89cd0359aabadad4ca511264170bc0144244a2a6bcc923b58793a53399","first_computed_at":"2026-05-18T02:14:08.422501Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:14:08.422501Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+ni3AzI4Gln55SmbM68JxIXFJMUjwF5puTDIOzZ/6yFmu0moyJJiCNM/rBmxBdD6RQpkHqndCSfR80B21WycDA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:14:08.423045Z","signed_message":"canonical_sha256_bytes"},"source_id":"0904.0101","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9fefa26ab7da07062e3a8897f6e64929bc3a4d17b10b8ec35253e6afff532a05","sha256:b91da2c41f510d8393491108cfd62e7f6d5e8d04ace20c3359a8b9e0518bd9a5"],"state_sha256":"a68d2c55fba7e2867f0021c6939e32e62441f0997c896ebfcb0fb49d5db32d95"}